System to limit memory access when calculating network data checksums
US6637007B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Apr 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/096
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention provides a method and process for transmitting data without using additional CPU cycles and memory accesses to calculate checksums. The transmitting device obtains data from an internal or external data source and stores that data in memory. The data is then divided into zones and checksums are calculated for each zone. The checksums are recorded on a checksum array. A data pointer containing an address for the data stored in memory, a description of the data and an address for the checksum array is transferred through data transfer protocol to network and transmission layers. The network and transmission layers are then able to access and send the data without having to either copy the data through data transfer protocol to network and transfer layers or read all of the data to calculate the checksums. This method and process uses fewer CPU cycles and memory accesses to transmit data and is, therefore, more efficient than the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.